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TARP Repurchase (Details) (USD $)
 0 Months Ended
Aug. 08, 2012
Jul. 03, 2012
Sep. 30, 2012
Dec. 31, 2011
TARP Repurchase [Abstract]        
Number of shares of preferred stock repurchased (in shares)   12,530    
Preferred stock, shares outstanding (in shares)     12,524 25,054
Purchase price per share (in dollars per share)   $ 933.36    
Total purchase price   $ 11,778,575.90    
Accrued and unpaid dividends on preferred stock included in total purchase price   83,575.10    
Number of shares retired (in shares)   12,530    
Difference between book value and purchase price of preferred stock retired   834,999.20    
Face value of preferred stock retired   12,530,000    
Treasury stock, retired, purchase price   11,695,000.80    
Number of common stock shares called by warrant (in shares) 357,234      
Warrant purchase price $ 425,000